/* ===== 页面专属 CSS — about ===== */
.page-about {
  --about-accent-line: var(--orange);
  --about-metric-color: var(--green);
  --about-bg-alt: #f8fbf9;
  --about-card-shadow: 0 8px 32px rgba(46, 139, 87, 0.10);
  --about-radius-card: 16px;
  --about-section-gap: 80px;
  font-family: var(--font-body);
  color: var(--text-primary);
  line-height: 1.6;
}

/* ---------- 面包屑 ---------- */
.page-about .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px 8px;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 16px 24px 0;
  font-size: 13px;
  letter-spacing: 0.02em;
}
.page-about .breadcrumb-item {
  color: var(--text-secondary);
}
.page-about .breadcrumb-link {
  color: var(--green);
  text-decoration: none;
  transition: color var(--transition);
}
.page-about .breadcrumb-link:hover,
.page-about .breadcrumb-link:focus-visible {
  color: var(--orange);
  text-decoration: underline;
}
.page-about .breadcrumb-current {
  color: var(--text-primary);
  font-weight: 600;
}
.page-about .breadcrumb-sep {
  color: var(--gray-border);
  font-size: 16px;
  line-height: 1;
}

/* ---------- 页面标题 ---------- */
.page-about .page-head {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 32px 24px 48px;
  text-align: center;
}
.page-about .page-head-title {
  font-family: var(--font-heading);
  font-size: clamp(32px, 8vw, 56px);
  line-height: 1.1;
  color: var(--green-dark);
  margin: 0 0 12px;
  letter-spacing: -0.01em;
}
.page-about .page-head-desc {
  font-size: clamp(16px, 3vw, 22px);
  color: var(--text-secondary);
  margin: 0;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
  position: relative;
  padding-top: 16px;
}
.page-about .page-head-desc::before {
  content: '';
  display: block;
  width: 60px;
  height: 4px;
  background: var(--about-accent-line);
  border-radius: 2px;
  margin: 0 auto 16px;
}

/* ---------- 通用章节 ---------- */
.page-about .section {
  padding: 40px 24px;
}
.page-about .section-wide {
  max-width: var(--max-width);
  margin-left: auto;
  margin-right: auto;
}
.page-about .section-narrow {
  max-width: 820px;
  margin-left: auto;
  margin-right: auto;
}
.page-about .section-heading {
  font-family: var(--font-heading);
  font-size: clamp(26px, 5vw, 38px);
  line-height: 1.15;
  color: var(--green-dark);
  margin: 0 0 16px;
  position: relative;
  display: inline-block;
}
.page-about .section-heading::after {
  content: '';
  display: block;
  width: 48px;
  height: 4px;
  background: var(--about-accent-line);
  border-radius: 2px;
  margin-top: 8px;
}
.page-about .section-subhead {
  font-size: 17px;
  color: var(--text-secondary);
  margin: -8px 0 32px;
  max-width: 640px;
}
.page-about .section-lead {
  font-size: 18px;
  font-weight: 500;
  color: var(--text-primary);
  margin: 0 0 16px;
  line-height: 1.6;
}
.page-about .section-body {
  font-size: 16px;
  color: var(--text-secondary);
  margin: 0 0 12px;
  line-height: 1.7;
}
.page-about .highlight {
  color: var(--green-dark);
  font-weight: 600;
  padding: 12px 20px;
  background: #ecf7f0;
  border-left: 4px solid var(--green);
  border-radius: 0 8px 8px 0;
}

/* ---------- 分割布局（宽章左右结构） ---------- */
.page-about .split-layout {
  display: flex;
  flex-direction: column;
  gap: 40px;
  align-items: flex-start;
}
.page-about .split-text {
  flex: 1 1 100%;
}
.page-about .split-visual {
  flex: 1 1 100%;
  display: flex;
  flex-direction: column;
  gap: 24px;
}
@media (min-width: 860px) {
  .page-about .split-layout {
    flex-direction: row;
    gap: 60px;
    align-items: center;
  }
  .page-about .split-text {
    flex: 1 1 45%;
  }
  .page-about .split-visual {
    flex: 1 1 50%;
  }
  .page-about .split-reverse {
    flex-direction: row-reverse;
  }
}

/* ---------- 品牌原则 ---------- */
.page-about .principle-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 20px;
}
.page-about .principle-tags .tag {
  font-size: 13px;
  padding: 6px 18px;
  border-radius: 20px;
  background: rgba(46, 139, 87, 0.10);
  color: var(--green-dark);
  border: 1px solid rgba(46, 139, 87, 0.20);
  font-weight: 500;
  transition: background var(--transition), color var(--transition);
}
.page-about .principle-tags .tag:hover {
  background: var(--green);
  color: var(--white);
  border-color: var(--green);
}

/* ---------- 图片 ---------- */
.page-about .hero-image {
  width: 100%;
  max-width: 800px;
  height: auto;
  aspect-ratio: 800 / 500;
  object-fit: cover;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  display: block;
}
.page-about .decor-image {
  width: 100%;
  max-width: 300px;
  height: auto;
  aspect-ratio: 300 / 200;
  object-fit: cover;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  display: block;
}
.page-about .community-img {
  width: 100%;
  max-width: 600px;
  height: auto;
  aspect-ratio: 600 / 400;
  object-fit: cover;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  display: block;
}

/* ---------- 数据指标块 ---------- */
.page-about .data-metrics {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}
.page-about .data-metric {
  background: var(--white);
  border-radius: var(--radius-card, 16px);
  padding: 20px 16px;
  text-align: center;
  box-shadow: var(--about-card-shadow);
  border: 1px solid rgba(46, 139, 87, 0.08);
  cursor: default;
  transition: transform var(--transition), box-shadow var(--transition);
}
.page-about .data-metric:hover,
.page-about .data-metric:focus-visible {
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(46, 139, 87, 0.18);
}
.page-about .data-metric-value {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(28px, 5vw, 40px);
  font-weight: 700;
  color: var(--about-metric-color);
  line-height: 1.2;
  transition: transform var(--transition);
  will-change: transform;
}
.page-about .data-metric-value[data-hover-scale]:hover {
  transform: scale(1.12);
}
.page-about .data-metric-label {
  display: block;
  font-size: 13px;
  color: var(--text-secondary);
  margin-top: 4px;
  letter-spacing: 0.03em;
}
@media (min-width: 520px) {
  .page-about .data-metrics {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* ---------- 刻度边框装饰 ---------- */
.page-about .scale-border {
  height: 6px;
  margin-top: 48px;
  background: repeating-linear-gradient(
    90deg,
    var(--gray-border) 0px,
    var(--gray-border) 2px,
    transparent 2px,
    transparent 12px
  );
  border-radius: 3px;
  max-width: 100%;
}

/* ---------- 服务边界展开列表 ---------- */
.page-about .service-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.page-about .service-item {
  border: 1px solid var(--gray-border);
  border-radius: var(--radius-md);
  background: var(--white);
  overflow: hidden;
  transition: box-shadow var(--transition), border-color var(--transition);
}
.page-about .service-item:hover {
  border-color: var(--green-light);
  box-shadow: var(--shadow-sm);
}
.page-about .service-summary {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 18px 24px;
  font-weight: 600;
  font-size: 17px;
  color: var(--text-primary);
  cursor: pointer;
  list-style: none;
  transition: background var(--transition), color var(--transition);
}
.page-about .service-summary::-webkit-details-marker {
  display: none;
}
.page-about .service-summary:hover,
.page-about details[open] .service-summary {
  background: #f0f7f3;
  color: var(--green-dark);
}
.page-about .service-icon {
  color: var(--green);
  font-size: 10px;
  transition: transform var(--transition);
}
.page-about details[open] .service-icon {
  transform: rotate(45deg);
  color: var(--orange);
}
.page-about .service-detail {
  padding: 4px 24px 20px;
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.7;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px;
}
.page-about .service-detail p {
  margin: 0;
  flex: 1 1 100%;
}
.page-about .btn-sm {
  padding: 6px 18px;
  font-size: 13px;
  border-radius: 20px;
  font-weight: 500;
  text-decoration: none;
  display: inline-block;
  transition: background var(--transition), color var(--transition), border-color var(--transition);
}
.page-about .btn-outline {
  background: transparent;
  border: 1.5px solid var(--green);
  color: var(--green);
}
.page-about .btn-outline:hover,
.page-about .btn-outline:focus-visible {
  background: var(--green);
  color: var(--white);
  border-color: var(--green);
}

/* ---------- 数据与信任 ---------- */
.page-about .data-card {
  background: var(--white);
  border-radius: var(--about-radius-card);
  padding: 28px 24px;
  box-shadow: var(--about-card-shadow);
  border: 1px solid rgba(46, 139, 87, 0.10);
}
.page-about .data-card-header {
  font-family: var(--font-heading);
  font-size: 20px;
  color: var(--green-dark);
  margin-bottom: 16px;
  letter-spacing: 0.02em;
}
.page-about .data-card-list {
  list-style: none;
  padding: 0;
  margin: 0 0 16px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.page-about .data-card-list li {
  font-size: 15px;
  color: var(--text-secondary);
  display: flex;
  align-items: baseline;
  gap: 8px;
}
.page-about .data-card-bullet {
  color: var(--orange);
  font-size: 16px;
}
.page-about .data-card-note {
  font-size: 13px;
  color: var(--text-secondary);
  padding-top: 12px;
  border-top: 1px dashed var(--gray-border);
  font-style: italic;
}
.page-about .trust-metrics {
  display: flex;
  flex-wrap: wrap;
  gap: 20px 32px;
  margin-top: 20px;
}
.page-about .trust-item {
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.page-about .trust-item-value {
  font-family: var(--font-mono);
  font-size: 26px;
  font-weight: 700;
  color: var(--orange);
  line-height: 1.2;
  transition: transform var(--transition);
  display: inline-block;
  will-change: transform;
}
.page-about .trust-item-value[data-hover-scale]:hover {
  transform: scale(1.15);
}
.page-about .trust-item-label {
  font-size: 13px;
  color: var(--text-secondary);
}

/* ---------- FAQ ---------- */
.page-about .faq-list {
  display: flex;
  flex-direction: column;
  gap: 24px;
}
.page-about .faq-item {
  padding: 0 0 20px;
  border-bottom: 1px solid var(--gray-border);
}
.page-about .faq-item:last-child {
  border-bottom: none;
}
.page-about .faq-question {
  font-size: 18px;
  font-weight: 600;
  color: var(--green-dark);
  margin: 0 0 8px;
  position: relative;
  padding-left: 24px;
}
.page-about .faq-question::before {
  content: 'Q';
  position: absolute;
  left: 0;
  top: 0;
  font-family: var(--font-mono);
  font-size: 16px;
  font-weight: 700;
  color: var(--orange);
}
.page-about .faq-answer {
  font-size: 15px;
  color: var(--text-secondary);
  margin: 0;
  line-height: 1.7;
  padding-left: 24px;
}
.page-about .faq-link {
  color: var(--green);
  text-decoration: underline;
  text-underline-offset: 2px;
  transition: color var(--transition);
}
.page-about .faq-link:hover,
.page-about .faq-link:focus-visible {
  color: var(--orange);
}
.page-about .faq-more {
  text-align: center;
  margin-top: 32px;
}
.page-about .btn-primary {
  display: inline-block;
  padding: 12px 32px;
  font-size: 16px;
  font-weight: 600;
  color: var(--white);
  background: var(--green);
  border: none;
  border-radius: 30px;
  text-decoration: none;
  cursor: pointer;
  transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
}
.page-about .btn-primary:hover,
.page-about .btn-primary:focus-visible {
  background: var(--green-dark);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(46, 139, 87, 0.30);
}

/* ---------- 社区归属 ---------- */
.page-about .community-wrap {
  display: flex;
  flex-direction: column;
  gap: 40px;
  align-items: center;
}
.page-about .community-text {
  text-align: center;
  max-width: 640px;
}
.page-about .community-text .section-heading::after {
  margin-left: auto;
  margin-right: auto;
}
.page-about .community-image {
  width: 100%;
  display: flex;
  justify-content: center;
}
@media (min-width: 820px) {
  .page-about .community-wrap {
    flex-direction: row;
    text-align: left;
    align-items: center;
  }
  .page-about .community-text {
    text-align: left;
    flex: 1 1 45%;
  }
  .page-about .community-text .section-heading::after {
    margin-left: 0;
    margin-right: 0;
  }
  .page-about .community-image {
    flex: 1 1 50%;
  }
}

/* ---------- 信任声明 ---------- */
.page-about .trust-statement {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 24px 24px 48px;
  text-align: center;
  font-size: 13px;
  color: var(--text-secondary);
  border-top: 1px solid var(--gray-border);
}
.page-about .trust-statement p {
  margin: 0;
  max-width: 640px;
  margin-left: auto;
  margin-right: auto;
}

/* ---------- 响应式微调 ---------- */
@media (max-width: 480px) {
  .page-about .section {
    padding: 32px 18px;
  }
  .page-about .page-head {
    padding: 20px 18px 32px;
  }
  .page-about .service-summary {
    padding: 14px 18px;
    font-size: 15px;
  }
  .page-about .service-detail {
    padding: 2px 18px 16px;
  }
  .page-about .data-metric {
    padding: 14px 10px;
  }
  .page-about .faq-question {
    font-size: 16px;
  }
  .page-about .faq-answer {
    font-size: 14px;
  }
  .page-about .trust-item-value {
    font-size: 22px;
  }
  .page-about .breadcrumb {
    padding: 12px 18px 0;
    font-size: 12px;
  }
  .page-about .page-head-title {
    font-size: 28px;
  }
}

/* ---------- 聚焦可见指示 ---------- */
.page-about *:focus-visible {
  outline: 2.5px solid var(--orange);
  outline-offset: 3px;
  border-radius: 4px;
}

/* ---------- 打印友好 ---------- */
@media print {
  .page-about .section {
    padding: 24px 0;
    page-break-inside: avoid;
  }
  .page-about .scale-border {
    margin-top: 24px;
  }
  .page-about .data-metric,
  .page-about .service-item,
  .page-about .data-card {
    box-shadow: none;
    border: 1px solid #ccc;
  }
  .page-about .hero-image,
  .page-about .decor-image,
  .page-about .community-img {
    max-width: 60%;
    box-shadow: none;
  }
  .page-about .btn,
  .page-about .btn-primary {
    background: #eee;
    color: #000;
    border: 1px solid #999;
  }
}

.page-about {
  --radius-card: var(--radius-md);
}